Anaphylaxis is a severe, potentially life-threatening allergic reaction. It can occur within seconds or minutes of exposure to something you're allergic to, like foods, insect stings, or medications. Symptoms often include hives, swelling, and difficulty breathing. Prompt medical attention is crucial.

Anaphylaxis FAQ


What are the common triggers of anaphylaxis?

Common triggers include certain foods (e.g., nuts, shellfish), insect stings, medications (e.g., penicillin), and latex.

What are the symptoms of anaphylaxis?

Symptoms may include hives, swelling, tightness in the throat, nausea, vomiting, diarrhea, abdominal pain, and difficulty breathing.

How is anaphylaxis treated?

It requires immediate medical attention. Treatment may involve administering epinephrine, oxygen therapy, and medications such as antihistamines and corticosteroids.

Is anaphylaxis common?

It's relatively rare but can occur in anyone, even if they haven't experienced severe allergic reactions before.

Can anaphylaxis be prevented?

Avoiding known triggers, carrying an epinephrine auto-injector, and seeking medical advice for allergic reactions can help prevent anaphylaxis.

How quickly do symptoms of anaphylaxis appear?

Symptoms can appear within seconds or minutes of exposure to the allergen, and they can worsen rapidly.

What should be done if someone is having an anaphylactic reaction?

Use an epinephrine auto-injector if available, call emergency services, and help the person remain calm and in a comfortable position.

Can anaphylaxis develop over time?

Yes, people can develop a sensitivity to a substance over time and may experience anaphylaxis upon subsequent exposure.

Should people with a history of anaphylaxis carry a medical ID?

Yes, a medical ID bracelet or necklace can alert others to the risk of anaphylaxis and the need for immediate medical intervention.

Can anaphylaxis be triggered by exercise?

In some cases, exercise can trigger anaphylaxis in individuals with exercise-induced anaphylaxis or those who have anaphylactic reactions related to specific foods.

What is the difference between anaphylaxis and a normal allergic reaction?

Anaphylaxis is a severe, potentially life-threatening allergic reaction that often involves multiple body systems, while a normal allergic reaction typically involves localized symptoms.

Are children more prone to anaphylaxis than adults?

Children are at a higher risk, often due to allergies to foods, insect stings, or latex. However, anaphylaxis can occur at any age.

Are there long-term consequences of experiencing anaphylaxis?

In some cases, there may be long-term consequences, and individuals who have experienced anaphylaxis should follow up with an allergist for proper management and guidance.

What is the role of antihistamines in anaphylaxis treatment?

Antihistamines are often used as part of the treatment plan to help relieve itching, hives, and other allergic symptoms, but they do not treat the life-threatening aspects of anaphylaxis.

Are there support groups or resources available for individuals with anaphylaxis?

Yes, there are numerous organizations and online resources offering support, education, and advocacy for individuals and families dealing with anaphylaxis.

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Information provided by Maryam Abdullahi-Mahdi. Reviewed by Mr. Matthew Liew